Kinetics of the autoxidation of a Jet-A fuel (POSF-2827) were examined with a near-isothermal flowing test rig (NIFTR) using passivated heat-exchanger tubing over the range 438-478 K. Analysis of the O-2 dependence for autoxidation of fuel having an initial O-2 saturation of 2.5-100% resulted in a reaction order of 0.5. Analysis for air-saturated fuel data based on the expected chain mechanism for a half-order O-2 dependence and second-order termination yielded log(k(ap)/M(1/2) s(-1)) = (12.9+/-0.4) - (36.9+/-0.8)/theta, where k(ap) is the apparent rate constant and theta=2.303RT kcal mol(-1) (R is the ideal gas law constant, and T is absolute temperature). Inferences from the derived kinetic parameters suggest that initiation involves H-atom abstraction from either a vinyl or an aromatic fuel species.